Button implementation of getListeners() returns incorrect value for PropertyChangeListener.

getListeners() in the following program returns 0 for PropertyChangeListner all the time no matter how many PropertyChangeListeners you add.

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import java.awt.*;
import java.beans.*;
import java.util.*;

public class TestGetListenersForButton
implements PropertyChangeListener{

    Button aComp = new Button();
    EventListener[] eventListener;

    public TestGetListenersForButton() {
        eventListener = aComp.getListeners(PropertyChangeListener.class);
        System.out.println("Before adding a listener: " + eventListener.length);

        aComp.addPropertyChangeListener(this);

        eventListener = aComp.getListeners(PropertyChangeListener.class);
        System.out.println("After adding a listener: " + eventListener.length);
    }

    public void propertyChange(PropertyChangeEvent e) {}

    public static void main(String[] args) {
        new TestGetListenersForButton();
    }
}


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edmund.lou@eng 1999-07-27
JFC SQE